> the vast majority of people will rate themselves as above average for any given ability, even though that’s by definition impossible.
Not "by definition". It's easy to build a probability distribution such that an arbitrarily large majority of samples are above average (e.g. if it has a long tail to the left).
Not "by definition". It's easy to build a probability distribution such that an arbitrarily large majority of samples are above average (e.g. if it has a long tail to the left).